聚合物内封装层辅助空气中钙钛矿模组器件制备及其光电特性  

Preparation and optoelectronic characteristics of perovskite module devices in air assisted by polymer inner packaging layern

作　　者：徐洁[1] 冯泽华 刘冰野 朱欣怡 代锦飞 董化[2] 吴朝新[2] Xu Jie;Feng Ze-Hua;Liu Bing-Ye;Zhu Xin-Yi;Dai Jin-Fei;Dong Hua;Wu Zhao-Xin(School of Science,Xi’an University of Architecture and Technology,Xi’an 710055,China;Shaanxi Key Laboratory of Photonics Technology for Information,School of Electronic Science and Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安建筑科技大学理学院,西安710055 [2]西安交通大学电子科学与工程学院,陕西省信息光子技术重点实验室,西安710049

出　　处：《物理学报》2023年第24期343-352,共10页Acta Physica Sinica

基　　金：陕西省自然科学基金(批准号:2023-JC-QN-0693);国家自然科学基金(批准号:12004298);中国博士后科学基金(批准号:2020M673399);西安建筑科技大学大学生创新创业训练计划(批准号:X2023110)的课题.

摘　　要：传统的高效率钙钛矿太阳能电池,需要在具有氮气保护的严苛条件下方可实现.高湿度(55%)空气环境中,大面积钙钛矿成膜工艺开发及器件结构优化对模组器件效率和稳定性的提高至关重要.本工作采用一种真空抽气萃取方法在空气中实现了高质量钙钛矿薄膜的制备,并研究了双端可低温光聚合单体分子对钙钛矿薄膜内封装的可行性.研究发现,当抽气时间为60 s,在空气中可以形成均匀、致密的钙钛矿薄膜.通过调控单体分子浓度,能够在内封装的同时,实现对钙钛矿表面缺陷的钝化,当浓度为1 mg/mL时,对应钙钛矿薄膜的形貌及荧光强度达到最优.最终,基于聚合物内封装修饰的刚性和柔性模组(有效面积:18 cm^(2))器件分别实现了19.51%和18.17%的室外光电转化效率(34.5%和30.2%的室内弱光转化效率).此外,聚合物内封装提升器件湿度稳定性及抑制铅泄漏的同时,也显著提升了柔性模组的耐弯折稳定性.聚合物内封装技术为未来大面积模组器件的发展及进一步产业应用提供了新的方向和可能.The preparation of traditional organic-inorganic lead-halogen hybrid perovskite solar cells often requires strict nitrogen glove box conditions,thus hindering their industrial scalability.This study develops a large-area perovskite film formation process and designs a novel device structure to achieve a dual enhancement of module device efficiency and stability in a high humidity air environment(55%).High-quality perovskite thin films are successfully prepared by vacuum extraction in ambient air,followed by a double-end low-temperature photopolymerization process utilizing acrylate monomer molecules for inner encapsulation modification of the freshly formed perovskite thin films.The influences of these techniques on the photoelectric characteristics of perovskite thin films and devices are investigated.The results indicate that uniform and dense perovskite films can be achieved in ambient air with a pumping time of 60 s.By adjusting the concentration of ethylene glycol dimethacrylate monomer molecules used in the low-temperature photopolymerization process,the surface defects on the perovskite film can be effectively controlled.The optimal concentration of 1 mg/mL results in perovskite film with optimal morphology and fluorescence intensity.Furthermore,rigid module device and flexible module device(effective area:18 cm^(2)),based on the polymer inner encapsulation,demonstrate outstanding outdoor photoelectric conversion efficiencies of 19.51%and 18.17%,respectively(with the highest indoor low-light conversion efficiencies of 34.5%and 30.2%,respectively).Notably,the untreated flexible device exhibits a significant decline in photoelectric conversion efficiency,falling below 50%of the initial value after one month of exposure to air.In contrast,device incorporating the polymer inner encapsulation layer maintains over 90%of their original efficiency,highlighting their excellent humidity resistance stability.Moreover,the polymer encapsulation layer also greatly improves the bending stability of the flexible device.Th

关 键 词：钙钛矿太阳能电池 模组 低温光聚合 聚合物内封装 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TQ317[化学工程—高聚物工业]